Abstract
In order to create new competitive advantages for the medium-haul aircraft An-148 and An-158, the application of the D-436-148FM engine for these aircraft has been considered. This would expand the operational range of aircraft flights, reduce noise on the ground, and harmful emissions from the engine. A distinctive feature is the achieved thrust of the engine D-436-148FM undera maximum emergency mode, 19.4 % higher than the thrust of the engine D-436-148D. That was made possible by optimizing the fan, improving the combustion chamber, and turbine cascade. The required amount of bench and flight tests has been performed. The engine certification is currently being completed. Specialists at the Antonov State Enterprise and Ivchenko-Progress State Enterprise studied the issue of installing the D-436-148FM engine on the An-148 and An-158 aircraft family. No changes to the design of the engine and aircraft are required. The engine is mounted on the same pylons without changes to the nacelle and engine bonnets. Energy-dependent systems associated with the engine have been investigated. There is no need for the fundamental changes in related systems for the engine’s operational modes according to the Aircraft Flight Manual. An engineering analysis of the comparison of flight-technical and flight-landing characteristics of the An-158 aircraft equipped with the engines D-436-148D and D-436-148FM has been performed. The data were obtained from the flight tests of the An-158 certified aircraft, taking into consideration the wind tunnel studies, flight tests of the An-178 aircraft, data from the An-158 Flight Manual, and the altitude and speed performance of the D-436-148D and D-436-148FM engines. The altitude and speed characteristics of the D-436-148FM engine, which have been calculated, were confirmed by the flight tests of the An-178 aircraft. A feasibility study of engine replacement has been carried out, based on the comparison of the technical and economic characteristics of the An-158 aircraft equipped with the D-436-148D engine and D-436-148FM operated in various atmospheric conditions. The principle of creating a family of aircraft of transport category of different configurations and purposes, based on a single engine, has been proposed
Highlights
Under current conditions of intensive improvement and rapid generational change of some aircraft models by others, the ratio between development and operational time intervals changes significantly, towards the reduction of the latter, changes significantly
We considered conditions of the standard atmosphere (+10 °C) and an airfield altitude along a route network Нairfield = 2,000 m
Based on the results of our study in to the aircraft performance (Fig. 7, 8), we can argue that the use of the D-436-148FM engines on the An-148-100 and An-158 aircraft leads to an improvement in the take-off cha racteristics of these types of aircraft compared to the D-436-148D engine
Summary
Under current conditions of intensive improvement and rapid generational change of some aircraft models by others, the ratio between development and operational time intervals changes significantly, towards the reduction of the latter, changes significantly This general trend in technology brings to the fore the task of reducing costs, including temporal, at the development stage [1, 2]. The theoretical basis for such met hods seems to be methods of comparing and evaluating design options at the conceptual level As it is known, the main indicator of the comparative assessment of modern transport and passenger aircraft (AC) is the level of competitiveness in the aviation market. The use of an aircraft PP is determined by the requirements set for AC In this case, a PP is the object of evaluation while an AC acts as a means of evaluating adop ted technical solutions. The feasibility study of engine replacement within a PP, based on comparing the technical and economic characteristics of the aircraft with the new engine when operating in different atmospheric conditions, is a re levant scientific and technical task
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